WBJECA 2025 — Computer PYQ

In computer architecture and digital logic, data is measured in hierarchical units. A nibble is a fundamental unit consisting of exactly 4 binary digits (bits).

To understand the relationship between these units, we can look at the mathematical scaling factor. If $B$ represents the number of bits, a nibble is defined as:

$$1\text{ nibble}=4\text{ bits}$$

Furthermore, a byte is composed of two nibbles. Therefore, the relationship between a byte and bits can be expressed as:

$$1\text{ byte}=2\times (1\text{ nibble})=2\times 4\text{ bits}=8\text{ bits}$$

In summary:

• Bit: The smallest unit (0 or 1).

• Nibble: $4$ bits.

• Byte: $8$ bits.

Because a nibble represents four binary positions, it can store $2^4$ unique values, which equals 16 different states (ranging from 0 to 15 in decimal, or 0 to F in hexadecimal).